package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 全局拦截器
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate  stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate){
        this.stringRedisTemplate = stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求头数据
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        //2.根据token查询redis
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(RedisConstants.LOGIN_USER_KEY + token);
        //3.验证用户是否存在
        if (userMap.isEmpty()) {
            //4.不存在则放行
            return true;
        }
        System.out.println("ok");
        //5.将查询到的Hash数据转为UserDTO
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);

        UserHolder.saveUser(userDTO);

        System.out.println("ok");

        //6.刷新token有效期
        String key = RedisConstants.LOGIN_USER_KEY + token;
        stringRedisTemplate.expire(key, 30, TimeUnit.MINUTES);
        System.out.println("ok");
        //7..放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
